MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Extrasystole
A premature contraction of the heart that is independent of the normal rhythm of the heart and that arises in response to an impulse in some part of the heart other than the normal impulse from the sinoatrial (SA) node. The extrasystole is…
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Show more- Diabetes Diabetes: Refers to diabetes mellitus or, less often, to diabetes insipidus. Diabetes mellitus and diabetes…
- Anaplasmosis A tick-borne disease of cattle, sheep, and related ruminants caused by a microorganism called Anaplasma…
- Cranial nerve, fourth The fourth cranial nerve, the trochlear nerve, is the nerve supply to the superior oblique muscle of the eye…
- Vasculitis, retinal Vasculitis, retinal: The retina is the portion of the eye that contains the nerves of sensation that perceive…
- Fetoscope (1) A flexible fiberoptic device used to view or operate upon a fetus within the womb (to do fetal…
- Prelingual Before the development of speech and language. 'She showed that in prelingually deaf people (that is, those…
- Liminal In neurolgy, at the threshold of perception to a sensory stimulus. In other words, just barely perceptible to…
- Bone, collar A horizontal bone above the first rib that makes up the front part of the shoulder. The collarbone, also…
- Melanoma, choroidal Malignant melanoma that arises in the eye. See ocular melanoma
- Metatarsophalangeal Referring to both the metatarsus and the phalanges of the toes
- Drug, over-the-counter (OTC) A drug for which a prescription is not needed
- Hormone, progesterone A female hormone, progesterone is the principal progestational hormone. Progestational hormones prepare the…